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In an inductor when current changes from 2 A to 18 A in 0.05 sec, the e.m.f. induced is 20 V. The inductance L is
Options
(a) 62.5 mH
(b) 625 mH
(c) 6.25 mH
(d) 0.625 mH
Correct Answer:
62.5 mH
Explanation:
Induced e.m.f. |e| = L (dI / dt) = L(18 – 2) / 0.05 or,
L = (20 × 0.05) / 16 = 0.0625 H = 62.5 mH
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Topics: Electromagnetic Induction
(76)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A coil of inductive reactance 31 Ω has a resistance of 8 Ω. It is placed in series
- A linear aperture whose width is 0.02 cm is placed immediately in front of a lens
- Radioactivity of a sample at T₁ time is R₁ and at time T₂ is R₂. If half-life
- Periodic time of a satellite revolving above Earth’s surface at a height equal to R,
- Two bulbs 60 W and 100 W designed for voltage 220 V are connected in series
Topics: Electromagnetic Induction (76)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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